Table 1

Sociodemographic characteristics at two stages

Variable

Stages


Registration (n = 2,891)

Final (n = 973)


Age

Mean ± (SD)

39.38 (±9.9)

38.2 (±9.7)

Sex

Female

62%

70%

Male

38%

30%

First

41%

37%

Level of

Second

32%

35%

Healthcare

Third

22%

19%

Central

5%

9%


Altamirano-Bustamante et al. BMC Medicine 2013 11:39   doi:10.1186/1741-7015-11-39

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